Convert embedded fonts to outlines

I have an EPS file that contains text in a particular, unusual font. The font has been embedded, so the rendering of the EPS looks fine. I can also convert easily to PDF or PS, keeping the font embedded along the way.  Again, for display purposes, this is fine.

However, I want to re-use this EPS, and edit it. I don't own the font that the EPS uses, and if I import it into Inkscape it does not offer to turn the font into outlines, and substitutes using a different font instead. This make the image unusable.

gs -dNOCACHE -q -dNOPAUSE -dBATCH -sDEVICE=pswrite -sOutputFile=outlines.ps fonts.ps
{code}
Which is great, but note that this only works with pswrite, and cannot be used to create the pdf directly. I used this, and then created a PDF from it using Apple Preview, and then loaded that into Inkscape to get the SVG for editing.

According to that link, the *ps2ai.ps* and *pstoedit* commands should also be able to embed outline fonts.